CN109238313B - Multi-parameter LC sensor for monitoring state of rotating structure - Google Patents
Multi-parameter LC sensor for monitoring state of rotating structure Download PDFInfo
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- CN109238313B CN109238313B CN201811088177.6A CN201811088177A CN109238313B CN 109238313 B CN109238313 B CN 109238313B CN 201811088177 A CN201811088177 A CN 201811088177A CN 109238313 B CN109238313 B CN 109238313B
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- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
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Abstract
The invention relates to the field of sensors, and discloses a multi-parameter LC sensor for monitoring the state of a rotating structure, which comprises an inductance unit and a plurality of capacitance sensors which are arranged on the rotating structure, wherein an inductance power supply comprises a plurality of single-turn coils which are sequentially connected, two ends of each single-turn coil are respectively connected with the capacitance sensors, an output coil is arranged on the periphery of the inductance unit, the output coil is used for passively and wirelessly outputting a plurality of resonance frequencies generated by the plurality of capacitance sensors, and each resonance frequency corresponds to different state parameters of the rotating structure. The sensor forms a multi-resonance-point LC resonance circuit through a plurality of capacitive sensors and an inductance unit, and obtains the real-time state of the rotating structure by wirelessly and passively reading different resonance frequency values, so that a plurality of state parameters of the rotating structure can be monitored in real time; in addition, a wireless and passive reading mode is adopted, so that the device can be used in a long-term maintenance-free manner and is suitable for severe environments such as high temperature, oil stain and the like.
Description
Technical Field
The invention relates to the field of pressure sensors, in particular to a multi-parameter LC sensor for monitoring the state of a rotating structure.
Background
A large number of rotating structures, such as bearing structures, gear structures, etc., are used in various industrial production facilities and transportation equipment. These rotating structures work under severe conditions such as high load and high rotation speed for a long time, and are one of the most prone to failure in mechanical equipment. Therefore, it is necessary to monitor the working condition of the rotating structure.
Because the rotating structure is in a rotating state during working, the traditional wired sensor is not suitable for monitoring the state of the rotating structure in real time. Currently, wireless and active sensor systems are mainly used for monitoring the state of the rotating structure of the key part. Wireless active sensors generally use a radio frequency transceiver circuit for data transmission, which relies on a battery for power supply. Due to the battery, such sensor systems cannot operate continuously for long periods of time. And, because of the active element, its working temperature cannot be too high.
Mechanical rotating parts are typically subjected to high temperatures or greasy environments. In such harsh environments, active circuitry and batteries are not desirable for use in the sensor. The wireless passive LC sensor transmits data by adopting an inductive near-field coupling principle and does not need to be powered by a battery. Meanwhile, the LC sensor system is composed of passive elements and is particularly suitable for severe environments with high-temperature oil stains. Therefore, the wireless passive multi-parameter LC sensor system is an ideal solution for monitoring the state of the rotating structure.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a multi-parameter LC sensor for monitoring the state of a rotating structure, a multi-resonance-point LC resonance circuit is formed by a plurality of capacitive sensors and an inductance unit, the real-time state of the rotating structure is obtained by wirelessly and passively reading different resonance frequency values, the real-time monitoring of a plurality of state parameters of the rotating structure is realized, and in addition, the wireless and passive reading mode is adopted, so that the multi-parameter LC sensor can be used without maintenance for a long time and is suitable for being used in severe environments such as high temperature, oil stain and the like.
In order to achieve the technical purpose, the embodiment of the invention adopts the following technical scheme:
the utility model provides a multi-parameter LC sensor for rotating-structure state monitoring, this sensor is including setting up inductance unit and a plurality of capacitanc sensor on rotating-structure, the inductance power includes a plurality of single turn coils that connect gradually, the both ends of each single turn coil are connected with capacitanc sensor respectively, inductance unit's periphery is provided with output coil, output coil is used for a plurality of resonant frequency that a plurality of capacitanc sensor of passive wireless output produced, each resonant frequency is corresponding with rotating-structure's different state parameter.
Furthermore, the inductance unit comprises a first single-turn coil, a second single-turn coil and a third single-turn coil which are sequentially connected, and the sizes of the first single-turn coil, the second single-turn coil and the third single-turn coil are sequentially increased.
Further, each single turn coil is arc shaped.
Furthermore, each single-turn coil comprises a metal layer, an insulating layer and an adhesion layer which are arranged from top to bottom in sequence.
Furthermore, each single-turn coil is fixed on the rotating structure through an adhesion layer.
Furthermore, the plurality of capacitive sensors comprise a first capacitive sensor, a second capacitive sensor and a third capacitive sensor, two ends of the first capacitive sensor are fixed to two ends of the first single-turn coil, two ends of the second capacitive sensor are fixed to two ends of the second single-turn coil, and two ends of the third capacitive sensor are fixed to two ends of the third single-turn coil.
Further, the output coil outputs a first resonance frequency generated by the first capacitive sensor, a second resonance frequency generated by the second capacitive sensor and a third resonance frequency generated by the third capacitive sensor.
Furthermore, the inductance unit, the output coil and the rotating structure are coaxially arranged.
Further, the output coil is shaped as a circular ring.
Compared with the prior art, the invention has the following technical effects:
the invention provides a multi-parameter LC sensor for monitoring the state of a rotating structure, which comprises an inductance unit and a plurality of capacitance sensors, wherein the inductance unit and the plurality of capacitance sensors are arranged on the rotating structure, an inductance power supply comprises a plurality of single-turn coils which are sequentially connected, two ends of each single-turn coil are respectively connected with the capacitance sensors, an output coil is arranged on the periphery of the inductance unit, the output coil is used for passively and wirelessly outputting a plurality of resonance frequencies generated by the plurality of capacitance sensors, and each resonance frequency corresponds to different state parameters of the rotating structure. Above-mentioned sensor is through setting up interconnect's a plurality of capacitanc sensor and inductance unit on rotating-structure, can make corresponding resonant frequency produce corresponding change when capacitanc sensor detects rotating-structure's state change, can acquire rotating-structure's real-time status through wireless passive different resonant frequency value of reading, thereby realize rotating-structure's real-time status monitoring, adopt wireless passive reading mode in addition, the sensor does not have the lead wire to link out, do not need the battery, can be long-term non-maintaining use after the installation, be fit for at high temperature, use in adverse circumstances such as greasy dirt.
Drawings
Fig. 1 is a schematic structural diagram of a multi-parameter LC sensor for monitoring a state of a rotating structure according to an embodiment of the present invention;
fig. 2 is a plan structure diagram of an inductance unit according to an embodiment of the present invention;
wherein: 1. an inductance unit; 11. a first single turn coil; 12. a second single turn coil; 13. a third single turn coil; 14. a metal layer; 15. an insulating layer; 16. an adhesion layer; 2. a capacitive sensor; 21. a first capacitive sensor; 22. a second capacitive sensor; 23. a third capacitive sensor; 3. an output coil; 4. and (5) a rotating structure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
As shown in fig. 1, an embodiment of the present invention provides a multi-parameter LC sensor for monitoring a state of a rotating structure, where the sensor includes an inductance unit 1 and a plurality of capacitive sensors 2, the inductance unit 1 includes a plurality of sequentially connected single-turn coils, two ends of each single-turn coil are respectively connected to the capacitive sensors, an output coil 3 is disposed on an outer periphery of the inductance unit, the output coil 3 is used for passively and wirelessly outputting a plurality of resonant frequencies generated by the plurality of capacitive sensors, and each resonant frequency corresponds to a different state parameter of the rotating structure.
Above-mentioned multi-parameter LC sensor is through setting up interconnect's a plurality of capacitanc sensor and inductance unit on rotating-structure, can make corresponding resonant frequency produce corresponding change when capacitanc sensor detects rotating-structure's state change, can acquire rotating-structure's real-time status through wireless passive different resonant frequency value of reading, thereby realize rotating-structure's real-time status monitoring, adopt wireless passive reading mode in addition, the sensor does not have the lead wire to link out, do not need the battery, but the long-term non-maintaining use after the installation, be fit for at high temperature, use in adverse circumstances such as greasy dirt.
Preferably, the inductance unit 1 includes a plurality of first single-turn coils, and the number of the single-turn coils is greater than or equal to 2, such as 3, 4, 5, and so on.
Preferably, the inductance unit 1 comprises a first single-turn coil 11, a second single-turn coil 12 and a third single-turn coil 13 which are connected in sequence, the sizes of the first single-turn coil 11, the second single-turn coil 12 and the third single-turn coil 13 are sequentially increased, and the three single-turn coils are connected end to end in sequence.
Preferably, each single-turn coil is in the shape of a circular arc, a square, a five-sided row, a triangle, or the like.
Preferably, each single turn coil is arcuate in shape, i.e. the radius of the arc increases progressively from one end to the other, and is arranged coaxially with the rotary structure so that each single turn coil can rotate about or in synchronism with the rotary structure.
Preferably, as shown in fig. 2, each single turn coil comprises a metal layer 14, an insulating layer 15 and an adhesion layer 16 which are arranged from top to bottom. Wherein the material of the metal layer 14 is any conductive material; the material of the insulating layer 15 is a resin material capable of performing an insulating function; the adhesion layer 16 functions as a connection.
Preferably, each single turn coil is secured to the rotating structure by an adhesive layer 16.
Preferably, the plurality of capacitive sensors include a first capacitive sensor 21, a second capacitive sensor 22 and a third capacitive sensor 23, two ends of the first capacitive sensor 21 are fixed to two ends of the first single-turn coil 11, two ends of the second capacitive sensor 12 are fixed to two ends of the second single-turn coil 22, and two ends of the third capacitive sensor 23 are fixed to two ends of the third single-turn coil 13.
Preferably, the output coil 3 outputs a first resonance frequency generated by the first capacitive sensor, a second resonance frequency generated by the second capacitive sensor, and a third resonance frequency generated by the third capacitive sensor.
Preferably, the inductance unit 1 and the output coil 3 are arranged coaxially with the rotating structure 4.
Preferably, the output coil 3 is shaped as a circular ring.
The working principle of the invention is as follows: the inductor and the capacitor are connected to form an LC resonant circuit. By connecting the three capacitive sensors (i.e. 21, the first capacitive sensor; 22, the second capacitive sensor; 23, the third capacitive sensor) with the three-segment single-turn coil (11, the first single-turn coil; 12, the second single-turn coil; 13, the third single-turn coil) of the inductance unit, an LC resonance circuit containing three resonance frequencies can be obtained. When one or more of the capacitive sensors detects a change in the state of the rotating structure, a corresponding change in one or more resonant frequencies of the multi-parameter LC sensor is produced. Based on the near-field coupling principle between the plane inductors, the resonance frequency values and the changes thereof can be wirelessly and passively read by adopting a reading coil connected with an impedance analyzer, so that the real-time state of the rotating structure is obtained.
Furthermore, in order to monitor the state of the rotating structure in real time, before measurement, a reading coil connected with an impedance analyzer is needed to calibrate the sensor of the invention, and the relationship between the three resonant frequencies and the state parameters of the three capacitive sensors is established. During measurement, the three resonant frequencies of the sensor are read by using a reading coil connected with an impedance analyzer, and compared with a calibration value, so that three state parameters of the rotating structure to be measured can be obtained.
In summary, the invention provides a multi-parameter LC sensor for monitoring a state of a rotating structure, the sensor comprises an inductance unit and a plurality of capacitance sensors, the inductance unit and the plurality of capacitance sensors are arranged on the rotating structure, an inductance power supply comprises a plurality of single-turn coils which are sequentially connected, two ends of each single-turn coil are respectively connected with the capacitance sensors, an output coil is arranged on the periphery of the inductance unit, the output coil is used for passively and wirelessly outputting a plurality of resonance frequencies generated by the plurality of capacitance sensors, and each resonance frequency corresponds to different state parameters of the rotating structure. According to the sensor, the plurality of capacitive sensors and the inductance units which are connected with each other are arranged on the rotating structure, when the capacitive sensors detect the state change of the rotating structure, the corresponding resonant frequency can be changed correspondingly, the real-time state of the rotating structure can be obtained by wirelessly and passively reading different resonant frequency values, and therefore the real-time state monitoring of the rotating structure is achieved. In addition, a wireless and passive reading mode is adopted, the sensor is connected without a lead wire, a battery is not needed, the sensor can be used in a maintenance-free mode for a long time after being installed, and the sensor is suitable for being used in severe environments such as high temperature, oil stain and the like.
It is clear to those skilled in the art from the foregoing description of the embodiments that, for convenience and simplicity of description, the foregoing division of the functional units is merely used as an example, and in practical applications, the above function distribution may be performed by different functional units according to needs, that is, the internal structure of the device may be divided into different functional units to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. The utility model provides a multi-parameter LC sensor for rotating-structure state monitoring, its characterized in that, the sensor is including setting up inductance unit and a plurality of capacitanc sensor on rotating-structure, inductance unit includes a plurality of single turn coils that connect gradually, each the both ends of single turn coil are connected with capacitanc sensor respectively, inductance unit's periphery is provided with output coil, output coil is used for passive wireless output a plurality of resonant frequency that a plurality of capacitanc sensor produced, each resonant frequency with rotating-structure's different state parameter is corresponding.
2. The multi-parameter LC sensor for monitoring the condition of a rotating structure according to claim 1, wherein the inductance unit comprises a first single turn coil, a second single turn coil and a third single turn coil which are connected in sequence, and the sizes of the first single turn coil, the second single turn coil and the third single turn coil are increased in sequence.
3. The multiparameter LC sensor for monitoring the condition of a rotating structure of claim 1, wherein each of said single turn coils is arcuate in shape.
4. The multi-parameter LC sensor for monitoring the condition of a rotating structure according to claim 1, wherein each of said single turn coils comprises a metal layer, an insulating layer and an adhesive layer sequentially arranged from top to bottom.
5. The multiparameter LC sensor for rotary structure condition monitoring of claim 4, wherein each of said single turn coils is secured to said rotary structure by said adhesive layer.
6. The multi-parameter LC sensor for monitoring the condition of a rotating structure according to claim 2, wherein the plurality of capacitive sensors includes a first capacitive sensor, a second capacitive sensor and a third capacitive sensor, both ends of the first capacitive sensor are fixed to both ends of the first single-turn coil, both ends of the second capacitive sensor are fixed to both ends of the second single-turn coil, and both ends of the third capacitive sensor are fixed to both ends of the third single-turn coil.
7. The multiparameter LC sensor for rotary structure condition monitoring of claim 6, wherein said output coil outputs a first resonance frequency produced by said first capacitive sensor and a second resonance frequency produced by said second capacitive sensor and a third resonance frequency produced by said third capacitive sensor.
8. The multiparameter LC sensor for monitoring the condition of a rotating structure according to claim 1, wherein said inductance unit, said output coil and said rotating structure are coaxially disposed.
9. The multiparameter LC sensor for monitoring the condition of a rotating structure of claim 1, wherein said output coil is shaped as a circular ring.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811088177.6A CN109238313B (en) | 2018-09-18 | 2018-09-18 | Multi-parameter LC sensor for monitoring state of rotating structure |
| PCT/CN2019/079133 WO2020057080A1 (en) | 2018-09-18 | 2019-03-21 | Multi-parameter lc sensor for monitoring state of rotating structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811088177.6A CN109238313B (en) | 2018-09-18 | 2018-09-18 | Multi-parameter LC sensor for monitoring state of rotating structure |
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| CN109238313A CN109238313A (en) | 2019-01-18 |
| CN109238313B true CN109238313B (en) | 2020-12-01 |
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| CN109238313B (en) * | 2018-09-18 | 2020-12-01 | 东南大学 | Multi-parameter LC sensor for monitoring state of rotating structure |
| CN110426064B (en) * | 2019-07-18 | 2021-07-20 | 东南大学 | Wireless passive sensor and wireless passive sensing method |
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| CN103792026A (en) * | 2012-11-03 | 2014-05-14 | 西安道恒交通设备科技有限公司 | Simple heat flow detection apparatus |
| CN103471653B (en) * | 2013-09-06 | 2015-08-19 | 中北大学 | Based on the high temperature wireless and passive three parameter integrated sensor of common burning porcelain technology |
| CN107085015B (en) * | 2017-04-11 | 2019-10-15 | 中北大学 | Wireless and passive gas, temperature biparameter sensor and preparation method thereof |
| CN109238313B (en) * | 2018-09-18 | 2020-12-01 | 东南大学 | Multi-parameter LC sensor for monitoring state of rotating structure |
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2018
- 2018-09-18 CN CN201811088177.6A patent/CN109238313B/en active Active
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- 2019-03-21 WO PCT/CN2019/079133 patent/WO2020057080A1/en active Application Filing
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| CN1563908A (en) * | 2004-03-12 | 2005-01-12 | 杭州利尔达单片机技术有限公司 | Non-magnet senser measurer and its measuring method |
| CN102798403A (en) * | 2012-08-21 | 2012-11-28 | 江苏物联网研究发展中心 | MEMS (Micro Electro Mechanical System) film capacitive type multi-parameter sensor structure and integrated manufacturing method thereof |
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| WO2020057080A1 (en) | 2020-03-26 |
| CN109238313A (en) | 2019-01-18 |
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